Probe Diameter

[Clownfishy]

Are all probes the same diameter? I wanted to purchase the GHL Probe Holder for the Apex probes but wanted to check if anyone knows if the probes are the same size? The Apex probe holders in the UK are insanely expensive so was looking at this -

http://www.reefdreams.co.uk/acatalog/GHL-Magnetic-4-Probe-Holder-PL_1053.html

 

[AdamNC]

All the probes are standard size except for the temp one which is thicker.

 

[Clownfishy]

All the probes are standard size except for the temp one which is thicker.

Many thanks, looks like I may need to check the temp probe.